Locomotive-boiler.



PATENTED AUG. .20, 1907.

v H. J. TRAVIS. LOCOMOTIVE BOILER. APPLICATIOF FILED FEB. 20, 1906.RENEWED JAKJB, 1907.

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Mia-5505 M r UNITED STATES osnron.

HERBERT JAY TRAVIS, OF NEW YORK, Y., ASSIGNOR TO THE VULCAN COMBUSTIONCOMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

LOCOMOTIVE-BOILER;

Specification of Letters Patent.

Patented Aug. 20, 1907.

Application filed February 20,19Q6,-SerialNo. 301,975. Koneweddanuary2,1907. serial No. 350.433.

To all whom it may concern:

Be it known that I, HERBERT JAY Tnavrs', a citizen of the United States,and a resident of the borough of Brooklyn, in the city and State of New-York, have in vented a new and useful Improvement in Locomotive-Boilers, of which the following is a specification.

- My invention relates to locomotives with the object in view ofproviding a boiler which will economize fuel and heat in the productionof steamand which 'is particularly adapted to'the burning of fuel in itspulverized state. i

A practical embodiment of my invention is represented in theaccompanying drawings, in which Figure 1 is a view of a locomotiveboiler and the parts which immediately coact therewith in verticallongitudinal section, Fig. 2 is a transverse section in the plane of theline A-A of Fig. 1, the frontoi the fire chamber being removed, and Fig.3 is a transverse section in the plane of the line B'B of Fig. 1.

The boiler is of the general type known in the art as the returnfire-tube boiler, in which the products of combustion after passingthrough the fire chamber to the forward end of the boiler return throughtubes to the rear end of the boiler and thence escape through a suitableuptake.

The shell of the boiler, in the present instance, is denoted by 1, thefire chamber by 2, and the return tubes for carrying the products ofcombustion from the forward end of the fire chamber back to the rear endof the boiler are denoted by 3.

The fire chamber is preferably made cylindrical in construction and isprovided with an outer metallic shell 4 preferably corrugated as shown,this shell being lined throughout a greater portion of its length within position by the engagement of its ends with the firebrick 5- whichline the interior of the fire chamber.

The fuel is admitted into the rear end of the fire 7 Chamber through apipe 8, the discharge end of which is directed toward the rear face ofthe slanting wall 7 so that the discharge of pulverized fuel will, as itis ignited, form a blast against the slanting face of the bafile wall 7and will then be'directed up over the wall and to the rear, as shown bythe arrows.

A door 9 opens and closes an opening 10 at the bottom of the rear wallof the fire chamber. The pipes 3 for the return of'the products ofcombustion are preferably arranged'around the fire chamber insubstantially the manner shown in Fig. 2, where they not only occupy aposition above the fire chamber, but down its opposite sides to pointsbelow the central axis of the chamber.

At the forward end of the fire chamber, the products of combustion arereceived intoan/ enlarged chamber 11, the rear wall of said chamber 11forming a support for the forward ends of the fire-tubes 3 andtheoforward wa1l12 of said chamber forming a support for a series of.

short fire-tubes 13, preferably grouped as shown in Fig. 3, the forwardends ofsaid. tubes being received in a plate 14, thespace between theplates 12 and 14 traversed by the short tubes 13 forming a: water leg atthe front of the boiler.

A plate 15 is spaced a short distance forward from th plate 14 and formsbetween it and the plate 14 a heat chamber in which the products ofcombustion may circulate, although there is no draft tending to forcethem into this chamber.

At the bottom of the walls 12, 14 and 15, there is an opening 16 formedfor gaining access to the interior of Y ith'e fire chamber andparticularly the enlarged chamber 11 at the front of the fire chamber toremove any ash or foreign substance which may accumulate there, and thisopening is normally kept closed by means of asuitable door 17. 7

In front of the plate 15 there is what is commonly known in locomotivesas the smoke chamber or smoke box, 18 access to which may be had througha door 19 in the front as is usual, and thence to the door 17,hereinabove described. The chamber 18 is, however, in my presentstructure no longer a smoke chamber but is a chamber for theexhauststeam, and into this chamber the exhaust steam from thecylinders, not shown, is admitted, as, for example, through a largemouthed pipe 20 so as to form no choking whatever oi the exhaust, theescape of steam from the chamber 18 taking place freely through anopening 21 atthe top of the chamber. This chamber 18 also serves tomuffle-the noise oithe exhaust. c

It is to be understood that the usual pipes for conveying the dry steamfrom the dome 22 may pass along the space between the tubes 3 and theshell 1 at the top of the boiler and through the plates 14 and 15 andthence on through the chamber 18 to the cylinder. These pipes are notshown, as they form no part of my present invention. v r e l At therear, the products of combustion are received into a chamber 23, whichmay be in the cab .ofthe locomotive, and from this chamber they passupwardly through an up-take 24 top of the cab.

This structure provides in the? first place for burning I pulverizedfuel efliciently and economically and serves to convey the heat to thewater with little waste of heat,

and further provides for passing the smoke out of the locomotive back ofthe position which the engine driver commonly occupies and'hence whereit wi111 not obend of the fire chamber; return fire-tubes leading fromsaid.

enlarged chamber to the rear of the boiler and an up-take incommunication with the rear ends ofsaid fire-tubes.

2. A locomotive boiler provided with a fire chamber extending alongwithin it, a laterally enlargedchamber at the forward end oif the firechamber, return flre tubes leading rearwardly from said enlarged chamberand short flre-. tubes leading forwardly from said chamber through ainto the atmosphere above the water Ieg formed in front of said chamber,and a plate spaced from the forward ends of said short fire-tubesforming a heating chamber forward of said tubes.

3. A locomotive boiler having inclosed therein a fire chamber, returnfire-tubes lading from the forward end of said chamber tothe rear, anup-take in communication with the rear ends of said tubes and a chamberat the front of the boiler cut oil from the products of combustion andfrom'the interior of the boiler for the reception of the exhaust-steam.i

4. A locomotive boiler having a fire chamber located therein, the saidfire chamber being provided with a wall consisting 01! a corrugatedmetallic casing and brick lining extending'around the interior of thewall throughout a portion only of the leng h of the chamber, an enlargedlateral chamber in connection with the forward end of "said firechamber, return fire-tubes 'leading to the rear from said enlargedchamber and an up-tuke in communication with the rear ends of thefire-tubes.

In testimony, that I claim the foregoing as my invention, I have signedmy name in presence of two witnesses, this 16th day of February, 1906.

HERBERT JAY TRAVIS.

Witnesses:

FREDK. HAYNES, C. S. SuNnonEN.

